VMware: remove unused parameter 'network_info'

The parameter 'network_info' is not used for destroying an instance and
doesn't need to be passed through the whole stack.

Change-Id: I0a8b912ff7693478917e849e17093d1541adeeeb
Update requirements to include decorator>=3.4.0

This third party package is used but there was no specific
requirement for it.

Change-Id: I50fcc7a1c4029b36e02e75eaf27df7ca791aef4e
Cleanup: remove unused argument

The vm_util.get_values_from_object_properties(...) method in the VMware
driver takes an unused param 'properties'.

This patch cleans up the method signature.

Change-Id: Iba738c2b49f829c1c0e17973b5265e88741fade7
Removes useless stub of glanceclient create

There was a stub out of glanceclient.create that was being called from a
couple unit test setUp()'s, but the stub method stubs out something that
is overridden by the stub_out_glance() fake method.

Change-Id: I300f6ccc999958c33a2dd729cb8bde89bed63967
Merge "VMware: remove unused parameter 'network_info'"
Merge "Update requirements to include decorator>=3.4.0"
Merge "Removes useless stub of glanceclient create"
Merge "Cleanup: remove unused argument"